A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6610-01-548-6549
NSN 5975-01-322-8106
NSN 5945-01-312-5411
NSN 5835-00-126-2961
NSN 5935-01-408-2485
NSN 5998-01-508-3677
NSN 6610-01-572-6625
NSN 4140-01-451-4180
NSN 5975-01-412-7780
NSN 5915-00-446-4143
NSN 5935-01-629-9121
NSN 6620-00-518-3595